Arithmetic and control unit



FIG. 1 is a perspective view of front, top and right side of an arithmetic and control unit showing my new design;

FIG. 2 is a perspective view of rear, bottom and right side thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a right side view thereof;

FIG. 7 is a top view thereof;

FIG. 8 is a bottom view thereof;

FIG. 9 is an enlarged view at area 9 thereof;

FIG. 10 is an enlarged view at area 10 thereof;

FIG. 11 is an enlarged view at area 11 thereof; and,

FIG. 12 is an enlarged view at area 12 thereof.

The broken lines form no part of the claimed design. 

CLAIM The ornamental design for an arithmetic and control unit, as shown and described. 